I am bidding on an auction where other buyers use ebay's max bid to bid on their behalf. I know this because I can see from the automatic bid history for that item. Here's my question:

Say the item is at $66 right before closing. I have Myibidder set to $120 to be placed 5 seconds prior to the auction closing.

If Myibidder bids $67 on my behalf at 5 seconds out, and others have the ebay max bid set at $70, will the ebay max bid have enough time in that 5 seconds to top my bid right before the auction closes? I guess i'm just wondering about the timing of the various bid systems.

If your snipe is 120, then Myibidder will bid 120. There is no reason to bid less for the reason you described -- other bidders may have their maximum bid higher than the current bid.

Myibidder will bid 120, but you will win the item at 70 + 1 (bid increment) = 71.

I see! So as long as my snipe is set higher than everyone else's max bid, then I should win.

Let me know if you have any other advice to maximize the chance of my winning this auction!

Thanks for the help. Much appreciated.

The simplest advice is to set your absolute maximum when setting up the snipe. Most of the time, you will pay less anyway.

Also, it helps to add a few pennies extra to beat those who bid even amount. Meaning, setting up 20.02 instead of 20.00 will increase your chance.